USPTO 2015–2025 USPTO PatentsView US Corporation

Hemlock Semiconductor Operations Llc

USPTO PatentsView assignee record - 9 granted patents across 16 technology areas, active 2018–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C01B (NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

13.1

Avg claims per patent

-71%

5-year filing velocity

The verdict

Hemlock holds 9 US patents across 16 technology areas, rank #28,928 of 50,000 tracked assignees.

#28,928
of 50,000 US assignees by volume: Top 67%
by Innovation Score (30.0/100): 13.1
avg claims per patent: -71%
filing velocity, last 5 yrs

Portfolio overview

Hemlock Semiconductor Operations Llc has been granted 9 US utility patents between 2018 and 2025, placing Hemlock Semiconductor Operations Llc at rank #28,928 across all assignees tracked by PlainPatent. This portfolio spans 16 distinct Cooperative Patent Classification (CPC) subclasses, averaging 13.1 claims per patent with primary concentration in C01B (NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C). As a US Corporation, Hemlock Semiconductor Operations Llc is one of the more focused assignees in the PatentsView dataset. By volume, Hemlock sits between Heated Blades Holding Company, Llc (9 patents, rank #28,924) and Heron Neutron Medical Corp. (9 patents, rank #28,932) - the closest US assignees by grant volume. The composite Innovation Score of 30.0/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 2 grants, compared with 7 in the 2015–2019 window, a -71% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The US Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Hemlock Semiconductor Operations Llc's 13.1 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while concentration in 16 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Hemlock Semiconductor Operations Llc against peers pursuing similar technology classes.

Heated Blades Hol…

9
Hebei University…

9
Hedvig

9
Hefei CAS ION Med…

9
Hengdian Group In…

9
HERO Health

9
HERO Scientific

9
Heron Neutron Med…

9
Hemlock Semicondu… ◀

9

What this shows Hemlock holds 9 patents at rank #28,928, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hemlock

By rank, the assignees closest to #28,928 in granted patent volume.

Leaders in C01B (Non-metallic Elements)

Other assignees with the most granted patents in Hemlock's primary technology class.

Hemlock's Innovation Score vs. every tracked assignee

Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)

30 Top 67% higher than 33% of 50,000 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2018–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

Hemlock Semiconductor Operations Llc patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	3	33.3%
2019	4	44.4%
2020	1	11.1%
2025	1	11.1%

Which technologies does Hemlock Semiconductor Operations Llc patent most?

C01B - NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C 5

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 3

B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 2

B08B - CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 1

C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS 1

B24C - ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL 1

C23C - COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 1

C30B - SINGLE-CRYSTAL GROWTH ; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL ; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE ; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WI 1

B07B - SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL 1

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 1

H05B - ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL 1

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 1

F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 1

B65G - TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS 1

B29D - PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE 1

Top 15 of 16 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Standard

Velocity Declining

Where it ranks

Overall rank by patents

#28,928

Across all tracked assignees

Innovation Score

30.0 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Hemlock Semiconductor Operations Llc hold?

Hemlock Semiconductor Operations Llc holds 9 US granted patents filed between 2018 and 2025, spanning 16 technology areas.

What is Hemlock Semiconductor Operations Llc's Innovation Score?

Hemlock Semiconductor Operations Llc has an Innovation Score of 30.0 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Hemlock Semiconductor Operations Llc focus on?

Hemlock Semiconductor Operations Llc's top technology area is C01B (NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C) with 5 patents. The company has filed patents in 16 CPC subclasses total.

Is Hemlock Semiconductor Operations Llc's patent filing rate increasing or decreasing?

Hemlock Semiconductor Operations Llc's recent filing velocity is -71% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Hemlock Semiconductor Operations Llc's patents?

Hemlock Semiconductor Operations Llc's patents average 13.1 claims each. This falls within the standard range, providing solid legal coverage.

How is the Hemlock Semiconductor Operations Llc patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

How to use this portfolio

Hemlock's 9 grants land it in the top 67% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Hemlock ranks #28,928 of 50,000. Top 50 holders
Most of this portfolio concentrates in C01B - see who else leads that technology area. C01B leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.